75XX XNAND Recovery: Difference between revisions
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To write a new kernel: | To write a new kernel: | ||
<source lang=bash> | <source lang=bash> | ||
nandctl - | dd if=zImage bs=512 conv=sync | nandctl -X -W 4095 -k kernel -z 512 -i -</source> | ||
</source> | |||
To write a new initrd: | To write a new initrd: | ||
<source lang=bash> | <source lang=bash> | ||
nandctl - | dd if=initrd bs=512 conv=sync | nandctl -X -W 4095 -k initrd -z 512 -i - | ||
</source> | </source> | ||
Revision as of 12:00, 12 February 2013
This needs to be done directly on the SBC. If you are running from the SD card the XNAND will not be mounted by default. You can also boot to the initrd of the XNAND and unmount the xnand:
umount /mnt/root
| WARNING: | Rewriting the XNAND from a Debian filesystem on the XNAND will result in a corrupted image. |
You can find the latest xnand image here. Once downloaded you can decompress the image using bzip2:
bzip2 -d xnandimg-latest.dd.bz2
The resulting file will be "xnandimg-latest.dd".
Backup
To backup the entire image containing the MBR/Kernel/Initrd/Debian you can run one command:
nandctl -XR 2048 -z 131072 > /path/to/backup.dd
To backup the current kernel:
nandctl -XR 4096 -z 512 --seek part1 > /path/to/kernel
To backup the initrd:
nandctl -XR 4096 -z 512 --seek part2 > /path/to/initrd
Restore
To write the entire image containing the MBR/Kernel/Initrd/Debian you can run one command:
nandctl -XW 2048 -z 131072 -i /path/to/xnandimg-latest.dd
To write a new kernel:
dd if=zImage bs=512 conv=sync | nandctl -X -W 4095 -k kernel -z 512 -i -
To write a new initrd:
dd if=initrd bs=512 conv=sync | nandctl -X -W 4095 -k initrd -z 512 -i -